Datasheet

Maxim Integrated │ 12
MAX98090 Ultra-Low Power Stereo Audio Codec
www.maximintegrated.com
Electrical Characteristics (continued)
(V
AVDD
= V
HPVDD
= V
DVDDIO
= 1.8V, V
DVDD
= 1.2V, V
SPKLVDD
= V
SPKRVDD
= V
SPKVDD
= 3.7V. Receiver load (R
RCV
) connected
between RCVP/LOUTL and RCVN/LOUTR (LINMOD = 0). Line output loads (R
LOUT
) connected between from RCVP/LOUTL and
RCVN/LOUTR to GND (LINMOD = 1). Headphone loads (R
HP
) connected from HPL or HPR to GND. Speaker loads (Z
SPK
) connected
between SPK_P and SPK_N. R
RCV
= J, R
LOUT
= J, R
HP
= J, Z
SPK
= J. C
REF
= 2.2µF, C
BIAS
= C
MICBIAS
= 1µF, C
C1N-C1P
=
C
CPVDD
= C
CPVSS
= 1µF. A
V_MICPRE_
= A
V_MICPGA_
= A
V_LINEPGA_
= 0dB, A
V_ADCLVL
= A
V_ADCGAIN
= 0dB, A
V_DACLVL
=
A
V_DACGAIN
= 0dB, A
V_MIXGAIN
= 0dB, A
V_RCV
= A
V_LOUT
= A
V_HP
= A
V_SPK
= 0dB. f
MCLK
= 12.288MHz, f
LRCLK
= 48kHz, MAS =
0, 20-bit source data. T
A
= T
MIN
to T
MAX
unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Gain Error DC accuracy 1 6.2 %
DIFFERENTIAL (ANALOG MICROPHONE) PREAMP and PGA
Full-Scale Input A
V_MICPRE
= 0dB 1 V
RMS
Microphone Preamplier Gain A
V_MICPRE
(Note 6)
PA_EN[1:0] = 01 0
dBPA_EN[1:0] = 10 19 20 21
PA_EN[1:0] = 11 29 30 31
Microphone Level Adjust Gain
(PGA)
A
V_MICPGA
(Note 6)
PGAM_[4:0] = 0x00 19 20 21
dB
PGAM_[4:0] = 0x14 0
MIC Input Resistance R
IN_MIC
All gain settings, measured at IN_
(measured single-ended)
28 50 kΩ
MICROPHONE BIAS
MICBIAS Output Voltage V
MICBIAS
I
LOAD
= 1mA, MBVSEL[1:0] = 00 2.1 2.2 2.3
V
I
LOAD
= 1mA, MBVSEL[1:0] = 01 2.3 2.4 2.5
I
LOAD
= 1mA, MBVSEL[1:0] = 10 2.475 2.57 2.7
I
LOAD
= 1mA, MBVSEL[1:0] = 11 2.7 2.8 2.9
Load Regulation
I
LOAD
= 1mA to 2mA,
MBVSEL[1:0] = 00
WLP ±0.085 ±0.5
mV
TQFN ±0.085 ±0.75
Line Regulation
V
SPKLVDD
= 2.8V to 5.5V, MBVSEL[1:0]
= 00
±0.01 ±1 mV
Ripple Rejection
V
RIPPLE (SPKLVDD)
= 100mV
P-P
f = 217Hz 95
dB
f = 1kHz
97
f = 10kHz
85
Noise Voltage
A-weighted, f = 20Hz to 20kHz
7.4 µV
RMS
f = 1kHz 52.3 nV/√Hz
SINGLE-ENDED (LINE) INPUT TO ADC PATH
Dynamic Range (Note 5) DR
f
S
= 48kHz, f
MCLK
= 12.288MHz, MODE =
1 (FIR audio)
98 dB
Total Harmonic Distortion + Noise THD+N V
IN
= 0.222V
RMS
, f = 1kHz -85 -80 dB
SINGLE-ENDED (LINE) INPUT PGA
Full-Scale Input V
IN
0.5
V
RMS
A
V_EXTERNAL
= -6dB, EXTBUF = 1 1